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2009-12-05Merge branches 'at91', 'ep93xx', 'etm', 'ks8695', 'nuc', 'u300' and 'u8500' ↵Russell King
into devel
2009-12-04Merge branch 'pending-dma-streaming' (early part) into develRussell King
2009-12-04Merge branch 'pending-dma-coherent' into develRussell King
2009-12-04Merge branch 'pending-misc' (early part) into develRussell King
2009-12-04ARM: I-cache: flush executable mappings in flush_cache_range()Russell King
Dirk Behme reported instability on ARM11 SMP (VIPT non-aliasing cache) caused by the dynamic linker changing protection on text pages to write GOT entries. The problem is due to an interaction between the write faulting code providing new anonymous pages which are incoherent with the I-cache due to write buffering, and the I-cache not having been invalidated. a4db94d plugs the hole with the data cache coherency. This patch provides the other half of the fix by flushing the I-cache in flush_cache_range() for VM_EXEC VMAs (which is what we have when the region is being made executable again.) This ensures that the I-cache will be up to date with the newly COW'd pages. Note: if users are writing instructions, then they still need to use the ARM sys_cacheflush API to ensure that the caches are correctly synchronized. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2009-12-04ARM: I-cache: avoid flushing in flush_cache_mm()Russell King
flush_cache_mm() is called in two cases: 1. when a process exits, just before the page tables are torn down. We can allow the stale lines to evict themselves over time without causing any harm. 2. when a process forks, and we've allocated a new ASID. The instruction cache issues are dealt with as pages are brought into the new process address space. Flushing the I-cache here is therefore unnecessary. However, we must keep the VIPT aliasing D-cache flush to ensure that any dirty cache lines are not written back after the pages have been reallocated for some other use - which would result in corruption. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2009-12-04ARM: I-cache: Add invalidation for VIVT ASID tagged cachesRussell King
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2009-12-04ARM: 5794/1: Flush the D-cache during copy_user_highpage()Catalin Marinas
The I and D caches for copy-on-write pages on processors with write-allocate caches become incoherent causing problems on application relying on CoW for text pages (dynamic linker relocating symbols in a text page). This patch flushes the D-cache for such pages. Cc: Nicolas Pitre <nico@fluxnic.net> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2009-12-04ARM: Remove __flush_icache_all() from __flush_dcache_page()Russell King
Both call sites for __flush_dcache_page() end up calling __flush_icache_all() themselves, so having __flush_dcache_page() do this as well is wasteful. Remove the duplicated icache flushing. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2009-12-04ARM: Move __flush_icache_all() out of flush_pfn_alias()Russell King
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2009-12-04ARM: Reduce __flush_dcache_page() visibilityRussell King
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2009-12-03ARM: 5845/1: l2x0: check whether l2x0 already enabledSrinidhi Kasagar
If running in non-secure mode accessing some registers of l2x0 will fault. So check if l2x0 is already enabled, if so do not access those secure registers. Signed-off-by: srinidhi kasagar <srinidhi.kasagar@stericsson.com> Acked-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2009-12-03ARM: 5792/1: bcmring: clean up mach/io.hLeo Chen
removed old macro definition for io access, using the generic macros defined in asm/io.h Signed-off-by: Leo Hao Chen <leochen@broadcom.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2009-12-02ARM: 5843/1: OMAP3: add AMBA devices for ETM and ETBAlexander Shishkin
This enables on-chip tracing components found in omap3xxx. Signed-off-by: Alexander Shishkin <virtuoso@slind.org> Acked-by: Tony Lindgren <tony@atomide.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2009-12-02ARM: 5841/1: a driver for on-chip ETM and ETBAlexander Shishkin
This driver implements support for on-chip Embedded Tracing Macrocell and Embedded Trace Buffer. It allows to trigger tracing of kernel execution flow and exporting trace output to userspace via character device and a sysrq combo. Trace output can then be decoded by a fairly simple open source tool [1] which is already sufficient to get the idea of what the kernel is doing. [1]: http://github.com/virtuoso/etm2human Signed-off-by: Alexander Shishkin <virtuoso@slind.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2009-12-01ARM: 5844/1: rename w90p910_defconfig to n uc910_defconfigwanzongshun
rename w90p910_defconfig Signed-off-by: Wan ZongShun <mcuos.com@gmail.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2009-12-01ARM: 5842/1: add spi resource support for nuc900wanzongshun
add spi resource support Signed-off-by: Wan ZongShun <mcuos.com@gmail.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2009-12-01ARM: 5839/1: add nuc960_defconfigwanzongshun
add nuc960_defconfig Signed-off-by: Wan ZongShun <mcuos.com@gmail.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2009-12-01ARM: 5838/1: add nuc950_defconfigwanzongshun
add nuc950_defconfig Signed-off-by: Wan ZongShun <mcuos.com@gmail.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2009-12-01ARM: ZERO_PAGE: Avoid flush_dcache_page() for zero pageRussell King
The zero page is read-only, and has its cache state cleared during boot. No further maintanence for this page is required. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2009-12-01ARM: Avoid evaluating page_address() multiple timesRussell King
page_address() is a function call rather than a macro, and so: if (page_address(page)) do_something(page_address(page)); results in two calls to this function. This is unnecessary; remove the duplication. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2009-12-01ARM: Avoid duplicated implementation for VIVT cache flushingRussell King
We had two copies of the wrapper code for VIVT cache flushing - one in asm/cacheflush.h and one in arch/arm/mm/flush.c. Reduce this down to one common copy. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2009-12-01ARM: 5835/1: ARM U8500: add defconfigSrinidhi Kasagar
Add defconfig file for mop500 board Signed-off-by: srinidhi kasagar <srinidhi.kasagar@stericsson.com> Acked-by: Andrea Gallo <andrea.gallo@stericsson.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2009-11-28ARM: 5834/1: ARM: U8500 integrate to ARM architectureSrinidhi Kasagar
This hooks the U8500 support into the ARM kbuild system. This integration also enables SMP and its helper functions for U8500 platform Signed-off-by: srinidhi kasagar <srinidhi.kasagar@stericsson.com> Acked-by: Andrea Gallo <andrea.gallo@stericsson.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2009-11-28ARM: 5833/1: ARM nomadik: enable U8500 for common platformSrinidhi Kasagar
Enable U8500 architecture to get access to the common code shared across various ST-Ericsson's machines like nomadik. Signed-off-by: srinidhi kasagar <srinidhi.kasagar@stericsson.com> Acked-by: Andrea Gallo <andrea.gallo@stericsson.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2009-11-28ARM: 5832/1: ARM: U8500 Makefile.bootSrinidhi Kasagar
The Makefile.boot for the U8500 platform Signed-off-by: srinidhi kasagar <srinidhi.kasagar@stericsson.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2009-11-28ARM: 5831/1: ARM: U8500 core machine supportSrinidhi Kasagar
Adds core support for the ST-Ericsson U8500 platform. It supports memory mappings, binds to the existing modules like GIC, SCU, TWD and local timers and sets up the infrastructure for the secondary core. Reviewed-by: Alessandro Rubini <rubini@unipv.it> Reviewed-by: Linus Walleij <linus.walleij@stericsson.com> Signed-off-by: srinidhi kasagar <srinidhi.kasagar@stericsson.com> Acked-by: Andrea Gallo <andrea.gallo@stericsson.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2009-11-28ARM: 5830/1: ARM: U8500 clock frameworkSrinidhi Kasagar
Adds basic clock framework to the U8500 platform. Currently it just uses the clock lookup table and add the each entry to the clkdevice. More complex clock management to follow soon Signed-off-by: srinidhi kasagar <srinidhi.kasagar@stericsson.com> Acked-by: Andrea Gallo <andrea.gallo@stericsson.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2009-11-28ARM: 5829/1: ARM: U8500 register definitionsSrinidhi Kasagar
Adds register definitions, shared peripheral interrupt numbers (SHPI) and IO mappings for the U8500 core support. SHPI are assigned to [160:32] where first 32 interrupts are reserved. Reviewed-by: Alessandro Rubin <rubini@unipv.it> Signed-off-by: srinidhi kasagar <srinidhi.kasagar@stericsson.com> Acked-by: Andrea Gallo <andrea.gallo@stericsson.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2009-11-28ARM: 5786/1: Introduce plat-nomadik, MTU code re-organizationSrinidhi Kasagar
Introduce the plat-nomadik folder for ST-Ericsson machines including the existing nomadik 8815 architecture. This also moves the existing MTU (MultiTimerUnit) of nomadik 8815 to the proposed plat-nomadik and adds HAS_MTU. The patch has been re-based to 2.6.32-rc6 Signed-off-by: srinidhi kasagar <srinidhi.kasagar@stericsson.com> Acked-by: Alessandro Rubini <rubini@unipv.it> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2009-11-25Merge branch 'mach-types'Russell King
2009-11-25[ARM] Update mach-typesRussell King
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2009-11-24ARM: dma-mapping: switch ARMv7 DMA mappings to retain 'memory' attributeRussell King
On ARMv7, it is invalid to map the same physical address multiple times with different memory types. Since system RAM is already mapped as 'memory', subsequent remapping of it must retain this attribute. However, DMA memory maps it as "strongly ordered". Fix this by introducing 'pgprot_dmacoherent()' which provides the necessary page table bits for DMA mappings. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> Acked-by: Greg Ungerer <gerg@uclinux.org> Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
2009-11-24ARM: dma-mapping: get rid of setting/clearing the reserved page bitRussell King
It's unnecessary; x86 doesn't do it, and ALSA doesn't require it anymore. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> Acked-by: Greg Ungerer <gerg@uclinux.org>
2009-11-24ARM: dma-mapping: Factor out noMMU dma buffer allocation codeRussell King
This entirely separates the DMA coherent buffer remapping code from the allocation code, and gets rid of the duplicate copy in the !MMU section. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> Acked-by: Greg Ungerer <gerg@uclinux.org>
2009-11-24ARM: dma-mapping: clean up coherent arch dma allocationRussell King
IXP23xx added support for dma_alloc_coherent() for DMA arches with an exception in dma_alloc_coherent(). This is a subset of what goes on in __dma_alloc(), and there is no reason why dma_alloc_writecombine() should not be given the same treatment (except, maybe, that IXP23xx doesn't use it.) We can better deal with this by moving the arch_is_coherent() test inside __dma_alloc() and killing the code duplication. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> Acked-by: Greg Ungerer <gerg@uclinux.org>
2009-11-24ARM: dma-mapping: move consistent_init into CONFIG_MMU sectionRussell King
No point wrapping the contents of this function with #ifdef CONFIG_MMU when we can place it and the core_initcall() entirely within the existing conditional block. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> Acked-by: Greg Ungerer <gerg@uclinux.org>
2009-11-24ARM: dma-mapping: factor dma_free_coherent() common codeRussell King
We effectively have three implementations of dma_free_coherent() mixed up in the code; the incoherent MMU, coherent MMU and noMMU versions. The coherent MMU and noMMU versions are actually functionally identical. The incoherent MMU version is almost the same, but with the additional step of unmapping the secondary mapping. Separate out this additional step into __dma_free_remap() and simplify the resulting dma_free_coherent() code. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> Acked-by: Greg Ungerer <gerg@uclinux.org>
2009-11-24ARM: dma-mapping: fix nommu dma_alloc_coherent()Russell King
The nommu version of dma_alloc_coherent was using kmalloc/kfree to manage the memory. dma_alloc_coherent() is expected to work with a granularity of a page, so this is wrong. Fix it by using the helper functions now provided. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> Acked-by: Greg Ungerer <gerg@uclinux.org>
2009-11-24ARM: dma-mapping: fix coherent arch dma_alloc_coherent()Russell King
The coherent architecture dma_alloc_coherent was using kmalloc/kfree to manage the memory. dma_alloc_coherent() is expected to work with a granularity of a page, so this is wrong. Fix it by using the helper functions now provided. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> Acked-by: Greg Ungerer <gerg@uclinux.org>
2009-11-24ARM: dma-mapping: functions to allocate/free a coherent bufferRussell King
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> Acked-by: Greg Ungerer <gerg@uclinux.org>
2009-11-24ARM: dma-mapping: split out vmregion code from dma coherent mapping codeRussell King
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> Acked-by: Greg Ungerer <gerg@uclinux.org>
2009-11-24ARM: 5791/1: ARM: MM: use 64bytes of L1 cache on plat S5PC1xxMarek Szyprowski
Samsung S5PC1xx SoCs are based on ARM Coretex8, which has 64 bytes of L1 cache line size. Enable proper handling of L1 cache on these SoCs. Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2009-11-24ARM: 5790/1: ep93xx: add missing newline between file header and codeHubert Feurstein
Just for the sake of consistency across the ep93xx-tree. Signed-off-by: Hubert Feurstein <h.feurstein@gmail.com> Acked-by: H Hartley Sweeten <hsweeten@visionengravers.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2009-11-24ARM: 5789/1: ep93xx: add missing file headersHubert Feurstein
Just for the sake of consistency across the ep93xx-tree. Signed-off-by: Hubert Feurstein <h.feurstein@gmail.com> Acked-by: H Hartley Sweeten <hsweeten@visionengravers.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2009-11-24ARM: 5775/1: ep93xx: add keypad core supportHartley Sweeten
Add the core support needed by the ep93xx matrix keypad driver. The keypad driver unfortunately was merged early and the core support is missing. The clkdev support has been resolved and is now merged. This adds the platform device to the ep93xx core and supplies the functions needed to acquire/free the gpio pins and actually enable/disable the controller peripheral. Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Acked-by: Ryan Mallon <ryan@bluewatersys.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2009-11-23ARM: 5793/1: ARM: Check put_user fail in do_signal when enable OABI_COMPATJean PIHET
Using OABI, the call to put_user in do_signal can fail causing the calling app to hang. The solution is to check if put_user fails and force the app to seg fault in that case. Tested with multiple sleeping apps/threads (using the nanosleep syscall) and suspend/resume. Signed-off-by: janboe <janboe.ye at gmail.com> Signed-off-by: Jean Pihet <jpihet@mvista.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2009-11-23ARM: dma-mapping: split dma_unmap_page() from dma_unmap_single()Russell King
We will need to treat dma_unmap_page() differently from dma_unmap_single() Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> Tested-By: Jamie Iles <jamie@jamieiles.com>
2009-11-23ARM: dma-mapping: provide dma_to_page()Russell King
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> Tested-By: Jamie Iles <jamie@jamieiles.com>
2009-11-23ARM: dma-mapping: simplify page_to_dma() and __pfn_to_bus()Russell King
The non-highmem() and the __pfn_to_bus() based page_to_dma() both compile to the same code, so its pointless having these two different approaches. Use the __pfn_to_bus() based version. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> Tested-By: Jamie Iles <jamie@jamieiles.com> Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
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